Articles About Stars (9)
Astronomical Glossary - Terms & Definitions
What do astronomers really mean when they use those technical terms?
Altitude & Azimuth: The Horizontal Coordinate System
Learn how to use altitude (elevation) and azimuth angles to locate any object in the sky, such as stars, planets, satellites, the Sun, or the Moon.
Timekeeping by Stars
Out and about at night without a watch or a smartphone readily available? If you are in the Northern Hemisphere use the Big Dipper and the North Star to tell the time.
How to measure the sky
Measure the sky and find out distances between celestial objects using your hands and fingers.
What Is a Conjunction?
Two astronomical bodies appear to meet in the sky鈥攂ut it鈥檚 an illusion.
What Is the Ecliptic?
The ecliptic is the name given to the path the Sun follows through the stars and constellations over the course of a year.
What Are Constellations?
What is a constellation? How many constellations are there, how can you spot them, and why isn't the Big Dipper a constellation?
Great Conjunction 2020
In December 2020, Jupiter and Saturn met in the sky in a rare Great Conjunction.
The Sun: Our Home Star
Energy from the Sun reaches Earth in the form of solar radiation, or sunlight.